196 lines
3.7 KiB
C
196 lines
3.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* var.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lderidde <lderidde@student.s19.be> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/01/28 10:08:49 by lderidde #+# #+# */
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/* Updated: 2025/01/28 10:09:55 by lderidde ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../includes/minishell.h"
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void free_null_ptr(void *ptr)
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{
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if (ptr != NULL)
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{
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free(ptr);
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ptr = NULL;
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}
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}
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char **copy_env_var(char **envp, int count)
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{
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char **new_env;
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int i;
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i = 0;
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new_env = malloc(sizeof(char *) * (count + 1));
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if (!new_env)
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return (NULL);
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new_env[count] = NULL;
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while (envp[i] && i < count)
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{
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new_env[i] = ft_strdup(envp[i]);
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free_null_ptr(envp[i]);
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i++;
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}
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free_null_ptr(envp);
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return (new_env);
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}
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int count_var(char **envp)
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{
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int i;
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i = 0;
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if (!envp)
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return (-1);
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while (envp[i])
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i++;
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return (i);
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}
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char *get_var_value(char *key, char **envp)
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{
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char *tmp;
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int i;
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tmp = ft_strjoin(key, "=");
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if (!tmp)
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return (NULL);
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i = 0;
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while (envp[i])
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{
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if (ft_strncmp(envp[i], tmp, ft_strlen(tmp)) == 0)
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{
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free_null_ptr(tmp);
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return (ft_strchr(envp[i], '=') + 1);
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}
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i++;
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}
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free_null_ptr(tmp);
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return (NULL);
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}
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bool is_valid_key(char *key, t_ast_n *head)
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{
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char *tmp;
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int i;
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tmp = ft_strjoin(key, "=");
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if (!tmp)
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return (false);
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while (head->env[i])
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{
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if (ft_strncmp(head->env[i], tmp, ft_strlen(tmp)) == 0)
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{
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free_null_ptr(tmp);
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return (true);
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}
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i++;
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}
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free_null_ptr(tmp);
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return (false);
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}
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int get_var_index(char *key, t_ast_n *head)
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{
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int i;
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char *new_key;
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new_key = ft_strjoin(key, "=");
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if (!new_key)
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return (-1);
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i = 0;
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while (head->env[i])
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{
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if (ft_strncmp(head->env[i], new_key, ft_strlen(new_key)) == 0)
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{
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free_null_ptr(new_key);
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return (i);
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}
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else if (ft_strncmp(head->env[i], key, ft_strlen(key)) == 0
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&& (ft_strchr(head->env[i], '=') == NULL &&
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(ft_strlen(head->env[i]) == ft_strlen(key))))
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{
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free_null_ptr(new_key);
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return (i);
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}
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i++;
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}
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free_null_ptr(new_key);
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return (-1);
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}
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int remove_env_var(char *key, t_ast_n *head)
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{
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int i;
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int j;
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i = get_var_index(key, head);
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if (i == -1)
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return (0);
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j = i;
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free_null_ptr(head->env[i]);
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while (head->env[i + 1])
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{
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head->env[i] = ft_strdup(head->env[i + 1]);
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free_null_ptr(head->env[i + 1]);
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j++;
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i++;
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}
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head->env = copy_env_var(head->env, j);
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if (head->env)
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return (1);
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return (0);
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}
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void set_var_env(char *key, char *value, t_ast_n *head)
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{
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int i;
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char *tmp;
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i = get_var_index(key, head);
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if (value)
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tmp = ft_strjoin(key, "=");
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if (!tmp)
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return ;
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if (i != -1 && head->env[i])
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{
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free_null_ptr(head->env[i]);
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head->env[i] = ft_strjoin(tmp, value);
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}
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else
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{
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i = count_var(head->env);
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head->env = copy_env_var(head->env, i + 1);
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if (!head->env)
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return ;
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head->env[i] = ft_strjoin(tmp, value);
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}
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free_null_ptr(tmp);
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return ;
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}
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char **init_env(char **envp)
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{
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char **env;
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int i;
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i = 0;
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env = malloc(sizeof(char *) * (count_var(envp) + 1));
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if (!env)
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return (NULL);
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env[count_var(envp)] = NULL;
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while (envp[i])
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{
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env[i] = ft_strdup(envp[i]);
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i++;
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}
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return (env);
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}
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